1 /* This file is part of the project "Hilbert II" - http://www.qedeq.org" target="alexandria_uri">http://www.qedeq.org
2 *
3 * Copyright 2000-2014, Michael Meyling <mime@qedeq.org>.
4 *
5 * "Hilbert II" is free software; you can redistribute
6 * it and/or modify it under the terms of the GNU General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 */
15
16 package org.qedeq.kernel.se.base.module;
17
18
19 /**
20 * Usage of conditional proof method. If you can derive the proposition A out of
21 * the assumed formulas then the following formula is true:
22 * conjunction of the assumed formulas implies A
23 * <pre>
24 * H hypothesis
25 * -------------------
26 * A
27 * ---------------
28 * H -> A
29 * </pre>
30 *
31 * @author Michael Meyling
32 */
33 public interface ConditionalProof extends Reason, FormalProofLine {
34
35 /**
36 * Get this reason.
37 *
38 * @return This reason.
39 */
40 public ConditionalProof getConditionalProof();
41
42 /**
43 * Get hypothesis.
44 *
45 * @return Hypothesis.
46 */
47 public Hypothesis getHypothesis();
48
49 /**
50 * Get proof that can use the hypothesis.
51 *
52 * @return Conditional proof.
53 */
54 public FormalProofLineList getFormalProofLineList();
55
56
57 /**
58 * Get conclusion. This is a newly proven formula.
59 *
60 * @return Reference to proved formula.
61 */
62 public Conclusion getConclusion();
63
64 }